crab cactus(n = noun.plant) schlumbergera truncatus, thanksgiving cactus, zygocactus truncatus - South American jointed cactus with usually red flowers; often cultivated as a houseplant; sometimes classified as genus Schlumbergera;
is a kind of cactus
is a member of genus zygocactus, zygocactus

alaska crab, alaska king crab, alaskan king crab, american crab apple, american lady crab, asian horseshoe crab, barrel cactus, bechtel crab, blue crab, cactus, cactus euphorbia, cactus family, cactus mouse, cactus wren, calico crab, cancer the crab, cherry crab, christmas cactus, crab, crab apple, crab cocktail, crab grass, crab legs, crab louis, crab louse, crab nebula, crab tree, cultivated crab apple, dungeness crab, easter cactus, english lady crab, european spider crab, fiddler crab, flowering crab, garambulla cactus, garland crab, giant crab, golden barrel cactus, hard-shell crab, hedgehog cactus, hermit crab, horseshoe crab, iowa crab, iowa crab apple, japanese crab, jonah crab, king crab, knowlton's cactus, lady crab, mantis crab, mistletoe cactus, mud crab, orchid cactus, oregon crab apple, oyster crab, pea crab, pitahaya cactus, prairie crab, prickly pear cactus, rainbow cactus, rat's-tail cactus, rattail cactus, redbird cactus, rock crab, russian cactus, siberian crab, siberian crab apple, soft-shell crab, soft-shelled crab, southern crab apple, spider crab, stone crab, swimming crab, thanksgiving cactus, vine cactus, western crab apple, wild crab